An analysis of erosional characteristics of the sandy coast in the eastern part of Wanning, Hainan
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摘要:
2011—2014年于万宁东部海岸建立了海岸动态监测系统, 包括120个岸线监测站位和30个岸滩剖面监测站位, 收集了4年间岸线和岸滩的实时变化信息。以这些实测资料为基础, 结合收集的海岸资料和实地调查, 对万宁东部海岸的侵蚀规律与特征进行了探讨。在季节变化中, 海岸呈现夏秋侵蚀冬春淤积的规律; 在年际变化中, 海岸总体呈侵蚀趋势, 但相邻年份间又呈现侵蚀和淤积相间的现象。万宁部分海岸受前滨采砂影响严重, 加上频繁的台风天气, 致使侵蚀加剧, 在两年时间内后滨侵蚀发育8m高的软质陡崖, 造成难以恢复的地形改变。
Abstract:A Coastal dynamic monitoring system was established on the eastern coast of Wanning Between2011 and2014.This system including 120 shoreline monitoring stations and30 beach monitoring stations, and4 years of shoreline and beach profile information monitoring data were collected.Based on the field measured date assistant with coastal information from field survey, the coastal erosion processes on eastern coast of Wanning were studied in this paper.The erosion of the coastline shows a seasonal pattern in which erosion dominates the summer and autumn and deposition the winter and spring.The coastline is generally in a receding trend in inter-annual variation, and there was also a seasonal change pattern in inter-annual variation.In addition to natural factors, foreshore sand mining is one of the principal causes of coastal erosion in the study area.Areas subjected to sand mining and typhoons exhibit a considerably receded shoreline characterized by abrupt, erosionsusceptible cliffs up to 8 m in height.
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Key words:
- sandy coast /
- foreshore sand mining /
- erosion regularity /
- Wanning
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表 1 乌场站波浪各波高、周期与出现频率
Table 1. The wave height, period and occurrence frequency at Wuchang station
波向 NE ENE E ESE SE SSE S SSW 平均波高/m 0.9 1.0 0.8 0.9 1.0 0.8 0.8 0.8 平均周期/s 4.3 4.3 4.3 4.6 5.5 4.9 3.8 3.8 频率/% 2.4 7.4 2.7 3.2 27.8 13.5 5.1 6.8 
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